Battery charger



FIG. 1 is a perspective view of top, front and left side of a batterycharger showing my new design;

FIG. 2 is a perspective view of top, rear and right side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom view thereof.

The ornamental design for a battery charger, as shown and described.